A more important question is "Why are you even considering using program RSWWWIDE?" The SAP Data Management Guide states:
Report RSWWWIDE deletes all types of work items. It should be used with great care, because it could also delete incomplete work items or part of a work flow in a production system.
You should only use this program in a non-production system. If you need to remove old workitems from your production system, you should archive them instead with archive object WORKITEM.
Best Regards,
Karin Tillotson